Duplex machine for simultaneously machining two members



Feb. 13 1945. H TT 2,369,461

DUPLEX MACHINE FOR SIMULTANEOUSLY MACHINING TWO MEMBERS Filed Oct. 7,1943 5 Sheets-Sheet 1 Hal.

' Feb. 1 1945. J. w. HOWLETT 7 2,369,461

DUPLEX MACHINE FOR SIMULTANEOUSLY MACHINING TWO MEMBERS Filed Oct. 7,1943 5 Sheets-Sheet 2 Even 7'0 1F, Haw/v W. AW

5 Sheets-Sheet 3 J. w. HOWLETT Filed 001;. 7, 1943 Feb. 13, 1945.

DUPLEX MACHINE FOR SIMULTANEOUSLY MACHINING TWO MEMBERS Feb.13, 1945.ETT 2,369,461

DUPLEX MACHINE FOR SIMULTANEOUSLY MACHINING TWO MEMBERS Fiied Oct. '7,1943 5 Sheets-Sheet 4 H- :.;I-P

lZ vE/vru fi' 376% W fidn/ZEW 1945' I J. w. HOWLETT I DUPLEX MACHINE FORSIMULTANEOUSLY MACHINING TWO MEMBERS 5 Shets-Sheet 5 Fil ed Oct. 7, 1943ings, wherein- PatentedFeb. 13, 19 45 MACHINING TWO MEMBERS John WilliamHotvlett, London, England, ,as'sign or ofone-ha'lf to WellworthyPistoriRing'sLim 1 ited, LondoinEngla'nd e j Application October 7, 1943,Serial .No. 505,369 r i In Great Britain December22, 1942, l p lroamsrying a tool, and, parallel thereto, and unopposite sides thereof,spindles for supporting the i l e (CI. 29-70) This invention relates 'toa duplex machine for simultaneously machining two members, of the kindincorporating arotatable spindle car- Accordingwto a further feature ofthe invention, provision is; made for automatically disconnecting thedrive to the lead screws dependently upon the position of either slidewith remembers, the spindles being carried byslides,

3 respectively, whichcan be fedtowardsthe toolcarr'ying spindle. i

As applied to a machine of this kind for forming piston-ringa washers,or other rings by (wt ting through metal pots, cylinders, or othertubular members in planes at right angles to their axes, bothtubularmembers have been of the same size and it has not been possible to formdifferent-sized rings by cutting up difierentf sized tubular members atthe same time. l My main object is to provide means whereby this will bepossible. l o

This and other objects and advantages of the invention will be betterunderstood if attention spect; to the tool-carrying spindle, so thatthequick-traverse willbe discontinued wheneither of the slides reaches anextreme position. Conveniently, the feed drive and the quick-traversedriveare both to a gear on, one ofzthe lead screws which are. detachablyconnected to one another to revolve-in unison, the manual means actingon'the other of the lead screws. Re'ferringnow to the drawings, themachine itself, it "will be observed from Figure 3, is in substanceshaped likeza squat T, excepting for i the base plate l2, the machinecomprising a headstock I3 in front of a main body 14 which be paid tothe following description l in which 1 reference is made to theaccompanying draw- Figure 1 is a front elevation of the left half of themachine having means for driving the lead screw according to theinvention, and Figure 2 E is a front elevation of therighthalf of themachine, the vertical centre line thereof marked I l in thetwo figures;

Figure 3 is a plan view of the machine to a smaller scale; Y

Figure 4 is a front s'ectional elevation of the being left-hand end ofthe machine to a larger scale;

Figure 5 is a cross-section taken on the lines V-V of Figures 4 and 6; l

Figure 6 is a sectional plan taken on the lines VP-VI of Figure 5;

Figure 7 is a sectional elevation corresponding toFigure 5; but to alarger scale, of the control handle 81 and associated points; thesection being taken on the line VIIj- -VIIof Figure 8; and a l v Figure8 is a fragmentary elevation corresponding to Figures] 1 and 2,but tothe larger scale showing the interconnection of the arms 94 in those twofigures with the shaftof the control handle 81.

According 'to' the invention, the slides canbe. fed by individual leadscrewswhich are connected to be driven in unison, whilst manual means isprovided for adjusting one of the lead screws relatively to the other,whereby the Inachine can be used for simultaneously machiningdiiferent-sized members, Preferably, the ma chine incorporates alsomanually-controlled, quick-traverse meansacting on the lead screws.

pending patent applicationserial No.

terminates ata lower levelthan the, top of the headstock and is machinedto provide aligned ways [5 in a horizontal plane for two'slides i5 andl'L The slides are substantially similar,

each supporting a spindle l8 adapted. to carry one of thetubular members,to be out through.

The cutter-carrying spindle 23 is driven from the headstock. l

The driving means forthese three spindles is preferably as disclosed inthe specification acs companying my copending patent application SerialNo. 505,366, filed the 7th of October, 1943, and the spindles l8 may besupported as disclosed in the specification accompanying my co- 505,367,filed the 7th of October, 1943.

In the right-hand side (Figure 2) of themachine is disposed the drivingmotor, not shown,

forthe spindles 18, the motor driving to a pulley-shaft supported by theboss 58. The pulley shaft drives by a belt 59 across the machine to apulley 603 (Figures Sand 6) in the left-hand half of the machine, thepulley BB driving,

' through a vertically-arranged pick-cit gear pair 62 (accessible uponremoval of the cover 63, which is at the back of themachine) to a pulley64, which in turn drives by belt to a pulley 65 (Figure 4) on a wormshaft 66 of a drop-out worm box pivotally mounted at 61.

The worm boX can be held withthe worm-in mesh 'with a worm wheel 68 bymeans of a catch, 59 "which can be released by a stop arm 1|], thelatter being manually operable or automatically, operable in 3 a wellunderstood manner when engaged by an adjustable abutment 'Hyon the slidel6.

worm box can be raised by means of the handie 12 (Figure 1); l

Fast Withth worm wheel 6B is a gear 13 whichmeshes through" an idler 14'with a gear The" 15 fast on a hollow lead screw it for the slide it.Extending through the hollow lead screw 16 is a lead screw 7! fortheslide l1, Figure 2 showing it engaged with a nut i8 fast with the slideI! and extending through a cored hole in the base I 3. The lead screw Tlhas fast on it a disc I9 which is adjustably coupled to the gear 15, thecoupling means in the present instancev being shown as comprisingT-headed bolts 80 engaged in an undercut groove provided in the gear 15.Thus, in ordinary conditions, the two lead screws'are driven in unisonwhen the .worm box is raised for automatic feeding purposes.

Referring again to Figuresb and 6, the pulley 60 is fast with a bevelgear 82 which is permanently meshed with oppositely-disposed bevelpinions 83 and 84 free on a shaft 85 and selectively clutchable theretoby a double-actingfconefaced member 86 operable by a handle 81. Theshaft 85 is formed with dogs 88 (Figures 4'and 6) Whichengage withcorrespondin dogs on a shaft 89 upon which the worm wheel '68 and gear13.are fast. Thus, when the worm box has been pendently upon the size ofthe tubular member to be mounted on its spindle, and it is necessary tomake sure that the quick-traverse motion will cease 'when whichever ofthe slides l6, l1 first completes its return movement, to obviate itoverrunning the ways l and causing damage. It is for this reason that weprovide each slide with an adjustable abutment 93 coacting with arms 94,the two arms being interconnected with one another and with the handle81 as described above.

, Referring now to, Figures 7 and 8, the two arms '94 are each in theform of bell crank levers, the

other arms I99, In! of which are connected by links I92, I93,respectively, to lower and upper arms I04, I05 fasten the shaft I06 uponwhich thecontrol handle 8'! is mounted, so that they lowered, operationof the handle 81 in one or the other direction introduces aquick-traverse movement of the slides l6, I! through the lead screws.

The handle 81 is conveniently biased to aneutral position as by means ofa spring 9i so that it must be held in an engaged position when thequick-traverse drive is required. The double-acting clutching member 86is preferably designed so that it can slip if the handle 8'! should bemoved in anengaging direction while the worm box is raised.

In order to prevent the slides when being returned by the quick-traversedrive from overrunning the ends of the ways, we provide each of themwith an adjustable abutment 93, the latter coacting in a known mannerwith armsil l on the right and left-hand sides of the machine andinterconnected with one another and with the handle 81 such as to ensurethe return of the latter to the neutral position when a quick traversein the return direction has been effected. In like manner furtherabutments may be provided on the slides to coact with the arms 94 andensure a disconnection of the quick-traverse drive in the forwarddirection before the tubular members are brought into engagement withthe cutters. One such abutment is indicated at 95 in Figure 2.

The duplex machine described is adapted for.

machining tubular members of differentdiameters, so that two differentjobs of work can-be attended to on the one machine when this should benecessary. For this purpose the relative loositions of the slides l6, I!with respect of the will be operated in unison when the control handleis operated; and when either arm 94 is operatively engaged by theassociated abutment 93 the control handle 81 will be returned to itsneutral position. The spring 9| of Figure 5 is omitted from Figure '7.What I claim as my invention and desire to secure by Letters Patent ofthe United States is:v

1. A duplex mach ne for simultaneously machining two members, includinga rotatable toolcarrying spindle, and parallel thereto and on op positesides thereof spindles for supporting the members, the last-mentionedspindles being carried byslides, respectively, individual lead screws,connected to be driven in unison for feedin said slides, and manualmeans for adjusting one of said lead screws relatively to the otherwhereby the machine can be used for simultaneouslymachiningdifferent-sized members.

2. A duplex machine for simultaneously machining two members, includinga rotatable toolcarrying spindle, and parallel thereto and on oppositesides thereof spindles for supporting the members, the last-mentionedspindles being carried by slides, respectively, individual lead screws,connected to be driven in unison for feeding said slides, manual meansfor adjusting one of said lead screws relatively to the other wherebythe machine can be. used for simultaneously machining different-sizedmembers, and manuallycontrolled quick-traverse means acting on saidcutters must be adjustable, and to enable this x to be done a coverplate 99 (Figure 4) is first rem'oved and the T-headedbolts 89 are thenreleased. Thereupon the lead screw FL-for the slide I I, can be turnedbya hand wheel 99 in. order to adjust this slide so that the peripheryof the tubular member to be mounted on its spindle l8 will be spacedfrom the.cutters a distance equal to that at which the periphery of thetubular member to be mounted on the spin dle l8 for the slide I 6 willbe spaced.- Thereupon the bolts 80 are tightened again to interconnectthe two lead screws for movement in unison and the cover plate 98 can bereplaced.

It will be appreciated that the slide l1 when lead screws.

lead screws.

3. A duplex machine for simultaneously machining two members, includinga rotatable toolcarrying spindle, and'parallel thereto and on oppositesides thereof spindles for supporting the members, the last-mentionedspindles being carried by slides, respectively, individual lead screws,connected to be driven in unison for feeding said slides, manual meansfor adjusting one of said lead screws relatively to the other wherebythe machine can be used for simultaneously machining different-sizedmembers, manually-controlled quick-traverse means acting on said leadscrews, and means operable by either of said slides (de pendently upontheir relative positions with reference to the tool-carryingspindle) fordisconnecting the drive to said lead screws as necessary.

4. An arrangement, according to claim 3, characterized in that the feeddrive and the quick traverse drive are both to a gear on one of saidlead screws, said lead screws being detachably connected to one anotherto revolve in unison, said manual means acting on the other of said J HNWILLIAM HOWLE'I'I,

